Method and apparatus for providing service using a sensor and image recognition in a portable terminal

ABSTRACT

A method and an apparatus provides a service using a sensor and image recognition in a portable terminal that supports Augmented Reality (AR). The method includes determining whether the portable terminal is parallel to ground using an acceleration sensor. When the portable terminal is parallel to the ground, either a map including nearby Point Of Interest (POI) information or constellation information is displayed.

CROSS-REFERENCE TO RELATED APPLICATION(S) AND CLAIM OF PRIORITY

The present application claims the benefit under 35 U.S.C. §119(a) to a Korean patent application filed in the Korean Intellectual Property Office on Sep. 24, 2009, and assigned Serial No. 10-2009-0090427, the entire disclosure of which is hereby incorporated by reference.

TECHNICAL FIELD OF THE INVENTION

The present invention relates generally to a method and an apparatus for providing a service using a sensor and image recognition in a portable terminal. More particularly, the present invention relates to a method and an apparatus for providing a service using the sensor and the image recognition in the portable terminal that supports Augmented Reality (AR).

BACKGROUND OF THE INVENTION

As communication technologies radically advance, various services are provided to allow users to enjoy a virtual reality and the real world simultaneously. For example, portable terminals provide an Augmented Reality (AR) service which overlays a graphical or text-type image describing an object over the object image input through a camera.

FIG. 1 illustrates a screen configuration for providing AR service in a portable terminal.

When a user executes an AR application, the portable terminal of FIG. 1 drives the camera, displays the image input from the camera on a screen, collects information of Point Of Interests (POIs) in the input image based on current location information, and then displays the collected information on the screen. The user may obtain the information related to the POI information in the vicinity by simply executing the AR application in the portable terminal and photographing the corresponding POI without having to look up the information in a book or to search on the internet.

However, as more portable terminals are used, users' expectation and demands for various service functions of the portable terminal are increasing. In this respect, to satisfy the high expectations and the diverse tastes of the users, it is necessary to provide various functions for the wide usage of the AR service.

SUMMARY OF THE INVENTION

To address the above-discussed deficiencies of the prior art, it is a primary aspect of the present invention to provide a method and an apparatus for providing a service using a sensor and image recognition in a portable terminal.

Another aspect of the present invention is to provide a method and an apparatus for providing a service using a sensor and image recognition in a portable terminal that supports Augmented Reality (AR).

Another aspect of the present invention is to provide a method and an apparatus for providing map information of a current location by obtaining an attitude angle using an acceleration sensor in a portable terminal that supports AR.

Another aspect of the present invention is to provide a method and an apparatus for providing constellation information of a current location by obtaining an attitude angle using an acceleration sensor in a portable terminal that supports AR.

Another aspect of the present invention is to provide a method and an apparatus for providing direction information through a geomagnetic sensor in a portable terminal that supports AR.

Another aspect of the present invention is to provide a method and an apparatus for adjusting zoom of a camera by detecting motion through an acceleration sensor in a portable terminal that supports AR.

Another aspect of the present invention is to provide a method and an apparatus for providing travel distance and time information to Point Of Interest (POI) displayed on a screen of a portable terminal that supports AR.

Another aspect of the present invention is to provide a method and an apparatus for providing a web search service using POI information displayed on a screen of a portable terminal that supports AR.

Another aspect of the present invention is to provide a method and an apparatus for obtaining and tagging an image including POI information to a corresponding POI in a portable terminal that supports AR.

Another aspect of the present invention is to provide a method and an apparatus for synthesizing POI information by recognizing a person's face when a picture is taken on a portable terminal that supports AR.

According to one aspect of the present invention, a method for providing a service using a sensor and image recognition in a portable terminal includes determining whether the portable terminal is parallel to ground using an acceleration sensor. And when the portable terminal is parallel to the ground, a map including nearby POI information or constellation information is displayed.

According to another aspect of the present invention, a method for providing a service using a sensor and image recognition in a portable terminal includes conducting a preview by driving a camera. Whether the portable terminal is moved backward or forward over a threshold distance is determined using an acceleration sensor. And when the portable terminal is moved backward or forward over the threshold distance, a zoom of the camera is adjusted by a preset level according to the traveled distance.

According to another aspect of the present invention, a method for providing a service using a sensor and image recognition in a portable terminal includes conducting a preview by driving a camera. Current location information is obtained and POI information is displayed in a preview image. When an image is captured, a graphical object indicating the POI information is synthesized over the captured image. And the synthesized image is tagged as an image of a POI corresponding to the POI information.

According to another aspect of the present invention, an apparatus for providing a service using a sensor and image recognition in a portable terminal includes an acceleration sensor for obtaining an attitude angle of the portable terminal. A controller determines whether the portable terminal is parallel to the ground using the attitude angle. And a display unit displays at least one of a map including nearby POI information and constellation information under control of the controller when the portable terminal is parallel to the ground.

According to another aspect of the present invention, an apparatus for providing a service using a sensor and image recognition in a portable terminal includes a camera for receiving an image. A display unit conducts a preview by displaying the image input from the camera An acceleration sensor measures movement of the portable terminal. And a controller determines whether the portable terminal is moved backward or forward over a threshold distance by using the measurement of the acceleration sensor and, when the portable terminal is moved backward or forward over the threshold distance, adjusts a zoom of the camera by a preset level according to the traveled distance.

According to yet another aspect of the present invention, an apparatus for providing a service using image recognition and a sensor in a portable terminal includes a camera for receiving an image. A display unit conducts a preview by displaying the image input from the camera. A Global Positioning System (GPS) receiver collects current location information. And a controller obtains POI information using the current location information, synthesizes a graphical object indicating the POI information over the captured image when an image is captured, and tags the synthesized image as an image of a POI corresponding to the POI information.

Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses embodiments of the invention.

Before undertaking the DETAILED DESCRIPTION OF THE INVENTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document: the terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation; the term “or,” is inclusive, meaning and/or; the phrases “associated with” and “associated therewith,” as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, or the like. Definitions for certain words and phrases are provided throughout this patent document, those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

FIG. 1 illustrates a screen configuration for providing an AR service in a portable terminal;

FIG. 2 illustrates a portable terminal that supports AR according to an embodiment of the present invention;

FIGS. 3A and 3B illustrate screen configurations for providing map information or constellation information based on an attitude angle in the portable terminal according to an embodiment of the present invention;

FIG. 4 illustrates a process for adjusting the zoom of a camera according to a motion of the portable terminal according to an embodiment of the present invention;

FIG. 5 illustrates a screen configuration for providing travel distance and time information to a specific POI in the portable terminal according to an embodiment of the present invention;

FIGS. 6A to 6C illustrate screen configurations for obtaining and tagging an image that includes POI information for a corresponding POI in the portable terminal according to an embodiment of the present invention; and

FIGS. 7A and 7B illustrate a process for providing the service using image recognition and a sensor in the portable terminal according to an embodiment of the present invention.

Throughout the drawings, like reference numerals will be understood to refer to like parts, components, and structures.

DETAILED DESCRIPTION OF THE INVENTION

FIGS. 2 through 7B, discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged portable terminal.

Embodiments of the present invention provide a method and an apparatus for providing a service using image recognition and a sensor in a portable terminal that supports Augmented Reality (AR).

FIG. 2 illustrates a portable terminal that supports AR according to an embodiment of the present invention.

Referring to FIG. 2, the portable terminal includes a controller 200, a communication module 210, a Global Positioning System (GPS) receiver 212, a geomagnetic sensor 214, an acceleration sensor 216, a camera 218, a display unit 220, an input unit 222, and a storage unit 224. The controller 200 includes a posture estimator 202, a motion detector 204, a Pedestrian Dead Reckoning (PDR) determiner 206, and an image recognizer 208.

The controller 200 controls and processes operations of the portable terminal. When an AR application is executed, the controller 200 controls and processes operations to drive the camera 218, to display an image input from the camera 218 on a screen of the display unit 220, to obtain current location information by controlling the GPS receiver 212, to collect information of Point Of Interest (POI) in the image based on the current location information, and to display the information on the screen. The POI information may be attained from the storage unit 224 or an external device via the communication module 210. Herein, the POI information may include name, location (e.g., latitude and longitude), category, area name, address, phone number, details, and related image information of the corresponding POI.

The controller 200 includes the posture estimator 202, the motion detector 204, the PDR determiner 206, and the image recognizer 208. Hence, when the AR application is executed, the controller 200 controls and processes operations to provide the service using the geomagnetic sensor 214, the acceleration sensor 216, and the camera 218.

The controller 200, which includes the posture estimator 202, obtains the attitude angle by controlling the acceleration sensor 216 and, based on the attitude angle, determines whether the portable terminal is parallel to the ground. In the parallel state, the controller 200 determines whether the screen of the portable terminal is facing the ground or the sky. By means of the posture estimator 202, when the portable terminal is substantially parallel with the ground and its screen predominantly faces the sky, the controller 200 determines to operate in a compass mode. When the portable terminal is substantially parallel with the ground and its screen predominantly faces the earth, the controller 200 determines to operate in a constellation mode. While the controller 200 determines whether to enter the compass mode or the constellation mode, according to the horizontality and the screen orientation of the portable terminal, the controller 200 may also determine whether to enter the compass mode or the constellation mode according to a lens orientation of the camera 218. Also, the controller 200 determines whether the portable terminal is parallel to the ground based on the attitude angle. That is, when the portable terminal and the ground make an angle below a threshold, the controller 200 may determine that the portable terminal is parallel with the ground.

When determining to enter the compass mode, the controller 200 controls the geomagnetic sensor 214 through the posture estimator 202 to obtain the orientation information of the portable terminal, controls the GPS receiver 212 to obtain the current location information, and displays the map of the current location and the orientation information on the screen of the display unit 220. In so doing, the controller 200 may acquire and provide nearby POI information based on the location information over the map. The controller 200 keeps displaying the image input from the camera 218 on the screen according to the execution of the AR application and displays the map and the orientation information at a certain position on the screen. For example, the controller 200 may continue displaying the image input from the camera 218 on the screen and display a compass-type map indicating the orientation of the portable terminal in the center of the screen as illustrated in FIGS. 3A and 3B. At this time, the compass-type map may indicate the presence of the POI information of the particular POI using an icon, and a distance to the POI such that the user may perceive the distance relation between the current location and the POI. The compass-type map may indicate the orientation of the portable terminal by showing a certain angle based on the location of the portable terminal. The angle alters as the orientation of the portable terminal changes.

When in the constellation mode, the controller 200 controls the GPS receiver 212 through the posture estimator 202 to acquire the current location information, acquires the constellation information based on the current location, and displays the acquired information on the screen of the display unit 220. The constellation information displayed on the screen changes in real time according to the location information of the portable terminal. The constellation information may be acquired from the storage unit 224 or an external device via the communication module 210. The constellation information may include location, name, origin, and detailed information of the constellation. For example, when the user holds the portable terminal substantially parallel with the ground while the screen predominantly faces the ground, the controller 200 may display the constellation based on the current location as shown in FIG. 3B.

The controller 200, including the motion detector 204, controls the acceleration sensor 216 to detect the motion of the portable terminal caused by the user, and controls and processes to adjust the zoom of the camera 218 according to the motion. By means of the motion detector 204, the controller 200 determines whether the portable terminal moves backward or forward over a threshold distance, bounces, or snaps, using the motion information such as speed or vibration of the portable terminal attained from the acceleration sensor 216. When the portable terminal moves over the threshold distance, bounces, or snaps, the controller 200 controls the camera 218 to zoom in or out according to a preset scheme. In more detail, through the acceleration sensor 216, the controller 200 determines whether the user pushes or pulls the portable terminal over the threshold distance, whether the user bounces the portable terminal, or whether the user snaps the portable terminal with his/her wrist. According to the determination, the controller 200 zooms in or out. For example, when the user pulls the portable terminal (i.e. away from the direction which the camera faces) over the threshold distance as illustrated in FIG. 4, the controller 200 controls the camera 218 to zoom in by a certain level. When the user pushes the portable terminal (i.e. towards the direction which the camera faces) over the threshold distance, the controller 200 controls the camera 218 to zoom out by a certain level. The zoom in/out degree of the camera 218 may vary depending on the distance of the backward or forward movement, the degree of the bounce or the snap, or the number of the bounces or the snaps of the portable terminal, and may be altered by the user's setting. In an embodiment, the zoom in/out function of the camera 218, according to the user's motion, may be carried out irrespective of the horizontality or the verticality of the portable terminal relative to the ground. For example, when the user pulls the portable terminal towards the user while the portable terminal is vertical to the ground, the controller 200 may zoom in or out. When the user pushes the portable terminal towards the ground while the portable terminal is parallel to the ground, the controller 200 may zoom in or out. In an embodiment, when the portable terminal is moved backward or forward over the threshold distance while it stands perpendicular to the ground, the controller 200 may determine whether this movement results from the push or pull of the portable terminal by the user, by determining whether the portable terminal moves toward or in the opposite direction of the screen or the camera of the portable terminal.

The controller 200, including the PDR determiner 206, controls the acceleration sensor 216 and the GPS receiver 212 to determine the travel distance and the travel time to the POI in the image displayed on the screen, and displays the determined distance and time in the display unit 220. For example, the controller 200 may show the travel time to the building in the image displayed on the screen as illustrated in FIG. 5. In doing so, the controller 200 computes the distance of the actual path of the user, rather than the straight-line distance from the current location of the portable terminal to the corresponding POI, and accordingly computes the travel time. The travel time may be determined using a speed or an average speed of the user during a certain time. The average speed indicates the average speed with respect to a plurality of users, and the speed and the average speed of the user may be distinguished based on the current speed and the situation of the user. In an embodiment, when the current speed exceeds a threshold, the controller 200 may determine that the user is driving a vehicle and thus uses the speed or the average speed of the user corresponding to the driving. When the current speed falls below the threshold, the controller 200 may determine that the user is walking and thus uses the speed or the average speed of the user corresponding to the walk. The controller 200 may determine the travel time to the corresponding POI using the speeds classified based on the condition of the road such as speed on the uphill road, speed on the downhill road, and speed on the stairs. The user speed may be estimated previously or currently, and the average speed may be pre-stored in the design phase of the portable terminal or obtained from an external device via the communication module 210.

The controller 200, including the image recognizer 208, examines whether the current screen is displaying the POI information when the photograph function occurs; that is, when a capture event occurs in the execution of the AR application. When the POI information is displayed, the controller 200 captures the image including the displayed POI information. For example, when the AR application is executed in the portable terminal, the POI information corresponding to the image displayed on the screen is present, and the user triggers the photograph event with the POI information displayed on the screen as illustrated in FIG. 6A, the portable terminal may attain the image including the POI information as illustrated in FIG. 6B by capturing the screen. At this time, the controller 200 tags the image including the POI information as the image related to the POI corresponding to the POI information and stores the tagged image in the storage unit 224. When the user executes a guide application related to the POI to obtain the POI information of the corresponding location as illustrated in FIG. 6C, the controller 200 may display the image including the POI information.

When the photograph function occurs; that is, when the capture event takes place in the execution of the AR application, the controller 200 including the image recognizer 208 captures the image input from the camera 218 and examines whether the captured image includes the user's face. When the user's face is detected, the controller 200 collects the POI information corresponding to the captured image through the GPS receiver 212, displays the POI information as a graphical object or a text comment, and controls and processes to synthesize over the captured image. The controller 200 may recognize the mouth or the teeth in the user face through the image recognizer 208 and synthesize the graphical object or the text comment of the POI information around the mouth or the teeth, to thus make it look like that the user is reciting the POI information.

When the POI information is displayed on the screen, the controller 200 controls and processes operations to integrate the POI information and a web search engine. In more detail, when the user selects particular POI information and triggers a web search event, the controller 200 controls and processes to search in the web by automatically extracting a search keyword from the particular POI information. The controller 200 controls and processes to obtain the name, the category, the area name, or the address information of the corresponding POI from the POI information as the search keyword, and to search the Internet with the obtained information. When there is no area name in the POI information, the controller 200 may extract the area name from the address information, and utilize an administrative district of the corresponding location as the area name with the latitude and the longitude.

The communication module 210 functions to transmit and receive radio signals of data input and output via an antenna (not shown). The communication module 210 may obtain the POI information by sending and receiving radio signals to and from the external device under the control of the controller 200.

The GPS receiver 212 obtains the location information indicating the location of the portable terminal; i.e. location coordinates from a GPS system, and forwards the obtained location information to the controller 200.

The geomagnetic sensor 214 measures the orientation of the portable terminal under the control of the controller 200 and provides the measured orientation information to the controller 200.

The acceleration sensor 216 measures and provides the direction, the speed, and the attitude angle of the movement of the portable terminal to the controller 200. While the acceleration sensor 216 is used to measure the motion of the portable terminal in this embodiment, other sensors may be used to measure the motion of the portable terminal.

The camera 218 converts an analog image signal photographed by a camera sensor to digital data by converting an optical signal detected in the image photographed through the camera sensor to an electrical signal and provides the converted digital data to the image recognizer 208.

The display unit 220 displays status information of the portable terminal, numbers and characters, videos, and still images. In more detail, under the control of the controller 200, the display unit 220 may display the compass-type map indicating the orientation of the portable terminal and the nearby POI information at a certain position of the screen as illustrated in FIG. 3A, and display the constellation information corresponding to the current location as illustrated in FIG. 3B. The display unit 220 may also display the distance and the travel time to the particular POI, as illustrated in FIG. 5, under the control of the controller 200.

The input unit 222 includes a plurality of function keys, number keys, and character keys, and provides the controller 200 with input data corresponding to the key pressed by the user or a user's touch.

The storage unit 224 contains various programs and data for the operations of the portable terminal. The storage unit 224 includes a POI Database (DB) to store the POI information, e.g., name, location (e.g., latitude, longitude), category, area name, address, phone number, detailed information, and related image information of particular POIs. The POI DB may be pre-stored and updated through the network or by an external device. In this embodiment, the storage unit 224 includes a constellation DB to contain location, name, origin, and details of constellations.

FIGS. 7A and 7B illustrate a process for providing the service using the image recognition and the sensor in the portable terminal according to an embodiment of the present invention.

When the AR application is executed in step 701, the portable terminal conducts the preview by driving the camera in step 703, and drives the acceleration sensor and the geomagnetic sensor in step 705. The acceleration sensor and the geomagnetic sensor may be driven to determine the horizontality of the terminal and the orientation and the movement direction of the terminal.

In step 707, the portable terminal determines whether it is substantially parallel to the ground. The portable terminal may determine whether it is substantially parallel to the ground by obtaining the attitude angle through the acceleration sensor. When the attitude angle with the ground is below the threshold, the portable terminal may determine its horizontality with the ground. In the horizontal state, the portable terminal goes to step 709. In the non-horizontal state, the portable terminal goes to step 719.

In step 709, the portable terminal determines the location of the screen, i.e. determines whether the screen is facing the ground or the sky. When the portable terminal is parallel to the ground and its screen faces the sky, it determines to enter the compass mode in step 711 and displays information guiding the orientation of the portable terminal and the nearby POIs. That is, portable terminal displays the compass-type map indicating the POI information in the certain position of the screen using the current location information in step 713. In doing so, the orientation of the portable terminal may be determined through the geomagnetic sensor and represented with an angle in the compass-type map. In an embodiment, the portable terminal may display the map in a certain portion of the screen while sustaining the preview screen. For example, while continuously displaying a, the portable terminal may display the compass-type map indicating the orientation of the portable terminal and the nearby POI information in the center of the screen. Next, the portable terminal returns to the step 707.

When the portable terminal is parallel to the ground and its screen faces the ground, the portable terminal determines to enter the constellation mode in step 715 and displays the constellation information on the screen using the current location information in step 717. The constellation information displayed on the screen is changed in real time based on the location information of the portable terminal. The constellation information may include the location, the name, the origin, and the detailed information of the constellation. For example, when the user holds the portable terminal in parallel to the ground with the screen facing the ground, the portable terminal may display the constellation based on the current location as illustrated in FIG. 3B. Next, the portable terminal returns to step 707.

Meanwhile, when the portable terminal is not parallel to the ground in step 707, it obtains the POI information based on the current location information and displays the detailed POI information in the preview screen in step 719.

In step 721, the portable terminal determines whether it is moved backward or forward over the threshold distance, bounced, or snapped. More specifically, through the acceleration sensor 216, the portable terminal determines whether the user pushes or pulls the portable terminal over the threshold distance, whether the user bounces the portable terminal, or whether the user snaps the portable terminal with his/her wrist.

When the portable terminal is moved backward or forward over the threshold distance, bounced, or snapped, it controls the camera 217 to zoom in or out by the preset level according to the amount of the movement, the amount of the bounce, or the intensity of the snap in step 723. For example, when the user pulls the portable terminal over the threshold distance as illustrated in FIG. 4, the camera 218 zooms in by the certain level. When the user pushes the portable terminal over the threshold distance, the camera 218 zooms out by the certain level. The zoom in/out degree of the camera 218 may vary depending on the amount of the backward or forward movement, the amount of the bounce, or the intensity of the snap of the portable terminal, and may also depend on the number of the movements, the number of the bounces, or the number of the snaps. When the portable terminal moves over a maximum threshold distance, the portable terminal determines the movement according to the walking or the driving of the user and does not adjust the zoom of the camera 218. Next, the portable terminal returns to step 707.

Alternatively, when the portable terminal is not moved backward or forward over the threshold distance, bounced, or snapped, the portable terminal examines whether one of the POIs displayed on the screen is selected in step 725. When a POI is selected, the portable terminal proceeds to step 727. When no POI is selected, the portable terminal goes to block 737.

When a POI is selected, the portable terminal displays details of the selected POI in step 727. In doing so, the portable terminal may determine and display the distance and the travel time to the POI. For example, the portable terminal may represent the travel time to the particular POI in the image displayed on the screen as illustrated in FIG. 5. Herein, the travel time may be computed by considering the actual path of the user rather than the straight-line distance from the current location to the corresponding POI. The travel time may be computed using the speed or the average speed of the user during a certain time.

In step 729, the portable terminal determines whether an Internet search function is selected. If the web search function is not selected, the portable terminal goes to step 737. If the Internet search function is selected, the portable terminal conducts the web search with the POI information in step 731. In detail, the portable terminal automatically extracts at least one search keyword from the selected POI information and automatically conducts the Internet search with the extracted search keyword(s). The search keyword(s) may be at least one of the name, the category, the area name, and the address information of the corresponding POI in the POI information.

The portable terminal displays web search results in step 733, and determines whether an event for ending the AR application or an event for returning to the previous state takes place in step 735. When the event for ending the AR application occurs, the portable terminal finishes this process. When the event for returning to the previous state occurs, the portable terminal returns to step 719.

In step 737, the portable terminal determines whether a capture event takes place. When no capture event occurs, the portable terminal returns to step 707. When a capture event takes place, the portable terminal captures the image input from the camera in step 739.

In step 741, the portable terminal determines whether the captured image includes the user's face. When the captured image includes the user's face, the portable terminal synthesizes and displays the graphical object including the POI information around the user's face in step 743. That is, when the captured image includes the user's face, the portable terminal displays the POI information collected in step 719 as the graphical object or the text comment and synthesizes over the captured image. In an embodiment, the portable terminal may recognize the mouth or the teeth in the user face and synthesize the graphical object or the text comment of the POI information around the mouth or the teeth, to thus make it appear as though the user is reciting the POI information. Next, the portable terminal enters step 747.

When the captured image includes no user face, the portable terminal synthesizes and displays the POI information over the captured image in step 745. Herein, while the portable terminal may synthesize and display the POI information over the captured image, the portable terminal may determine whether the POI information displayed when the image capture event takes place, and may capture the displayed the POI information together with the image. For example, the portable terminal obtains and displays the image including the POI information as illustrated in FIG. 6B. Next, the portable terminal goes to step 747.

In step 747, the portable terminal examines whether an event for storing the captured image takes place. When the storage event does not occur, the portable terminal returns to step 707. When the storage event takes place, the portable terminal stores the acquired image in step 749 and returns to step 709. In an embodiment, the portable terminal may tag and store the image including the POI information as the image relating to the POI corresponding to the POI information, and thus display the image including the POI information, as illustrated in FIG. 6C, when the user intends to get the POI information of the corresponding location by executing a related application for guiding the POI.

The portable terminal supporting the AR provides various information, such as map information of the current location, constellation information, and distance and time information, through the service using the image recognition and the sensor. Therefore, it is possible to meet the high expectation and the diverse tastes of the users.

Although the present disclosure has been described with several embodiments, various changes and modifications may be suggested to one skilled in the art. It is intended that the present disclosure encompass such changes and modifications as fall within the scope of the appended claims. 

What is claimed is:
 1. A method for providing a service using a sensor and image recognition in a portable terminal, comprising: displaying, by the portable terminal, a preview image obtained by a camera of the portable terminal; determining, using an acceleration sensor, whether the portable terminal is moved over a first threshold distance of two or more threshold distances; in response to determining the portable terminal is moved over the first threshold distance, adjusting a zoom level of the camera based on a distance of movement of the portable terminal; determining, using the acceleration sensor, whether the portable terminal is moved over a second threshold distance of two or more threshold distances; and in response to determining that the portable terminal is moved over the second threshold distance, restricting the zoom level of the camera.
 2. The method of claim 1, further comprising: determining, using the acceleration sensor, whether the portable terminal is bounced by the user; and when the portable terminal is bounced backward by the user, zooming in by a second preset level according to at least one of an amount of the bounce and a number of the bounces, and when the portable terminal is bounced forward by the user, zooming out by a second preset level according to at least one of an amount of the bounce and a number of the bounces.
 3. The method of claim 1, further comprising: determining, using the acceleration sensor, whether the portable terminal is snapped; and when the portable terminal is snapped backward by the user, zooming in by a third preset level according to at least one of an intensity of the snap and a number of the snaps, and when the portable terminal is snapped forward by the user, zooming out by a third preset level according to at least one of an intensity of the snap and a number of the snaps, wherein the portable terminal is snapped by a wrist action of a user.
 4. A method for providing a service using a sensor and image recognition in a portable terminal, comprising: displaying, by the portable terminal, a preview image obtained by a camera of the portable terminal; obtaining current location information and displaying Point Of Interest (POI) information in the preview image; when an image is captured, synthesizing a graphical object indicating the POI information over the captured image; tagging the synthesized image as an image of a POI corresponding to the POI information; executing a related application for guiding an orientation of the portable terminal to the POI information of a corresponding location; and displaying the synthesized image including the POI information using the related application.
 5. The method of claim 4, wherein synthesizing the graphical object comprises: determining whether the captured image comprises a user's face; and when the user's face is detected, synthesizing the graphical object indicating the POI information around the user's face.
 6. The method of claim 4, further comprising: when an Internet search function is executed while the POI information is displayed, extracting at least one search keyword from the POI information; and performing the Internet search with at least one extracted search keyword.
 7. The method of claim 4, wherein obtaining the current location information and displaying the POI information in the preview image comprises: determining and displaying at least one of a travel distance and a travel time by considering an actual path leading to the POI corresponding to the POI information displayed in the preview image, wherein the travel time is determined based on at least one of a user travel speed of the portable terminal and an average speed of a plurality of users over a certain time.
 8. An apparatus for providing a service using a sensor and image recognition in a portable terminal, comprising: a camera configured to obtain an image; a display configured to display a preview image obtained through the camera; an acceleration sensor configured to detect movement of the portable terminal; a controller configured to: determine, using of the acceleration sensor, whether the portable terminal is moved over a first threshold distance of two or more threshold distances; in response to determining that the portable terminal is moved over the first threshold distance, adjust a zoom level of the camera based on a distance of movement of the portable terminal; determine, using the acceleration sensor, whether the portable terminal is moved over a second threshold distance of the two or more threshold distances; and in response to determining that the portable terminal is moved over the second threshold distance, restrict the zoom level of the camera.
 9. The apparatus of claim 8, wherein the controller determines, using the acceleration sensor, whether the portable terminal is bounced backward by the user, and zooms in by a preset level according to at least one of an amount of the bounce and a number of the bounces, and when the portable terminal is bounced forward by the user, zooms out by a second preset level according to at least one of an amount of the bounce and a number of the bounces.
 10. The apparatus of claim 8, wherein the controller determines, using the acceleration sensor, whether the portable terminal is snapped, and when the portable terminal is snapped backward by the user, zooms in by a preset level according to at least one of an intensity of the snap and a number of the snaps, and when the portable terminal is snapped forward by the user, zooms out by a third preset level according to at least one of an intensity of the snap and a number of the snaps, wherein the portable terminal is snapped by a wrist motion of a user.
 11. An apparatus for providing a service using a sensor and image recognition in a portable terminal, comprising: a camera configured to capture an image; a display unit configured to provide a preview of the image by displaying the image from the camera; and a controller configured to: obtain Point Of Interest (POI) information in the preview of the image, synthesize a graphical object indicating the POI information over the captured image when the image is captured, tag the synthesized image as an image of a POI corresponding to the POI information, zoom in by a first preset level when the portable terminal is moved backward by a user over a first threshold distance, zoom out by the first preset level when the portable terminal is moved forward by the user over the first threshold distance, and determine that no zoom operation should be performed when the portable terminal is moved either forward or backward over a second threshold distance, the second threshold distance larger than the first threshold distance.
 12. The apparatus of claim 11, wherein the controller determines whether the captured image comprises a user's face, and synthesizes the graphical object indicating the POI information around the user's face when the user's face is detected.
 13. The apparatus of claim 11, further comprising: a communication module configured to transmit and receive data, wherein when an Internet search function is executed while the POI information is displayed, the controller extracts a at least one search keyword from the POI information and conducts the Internet search through the communication module using at least one extracted search keyword.
 14. The apparatus of claim 11, wherein the controller controls to determine and display at least one of a travel distance and a travel time by considering an actual path leading to the POI corresponding to the POI information displayed in the preview image, and determines the travel time based on at least one of a user movement speed of the portable terminal and an average speed of a plurality of users over a certain time.
 15. The method of claim 1, wherein adjusting the zoom level of the camera comprises: when the portable terminal is moved backward over the first threshold distance, zooming in by a first preset level based on the distance of movement; and when the portable terminal is moved forward over the first threshold distance, zooming out by the first preset level based on the distance of movement.
 16. The apparatus of claim 8, wherein the controller is configured to: zoom in by a first preset level based on the distance of movement when the portable terminal is moved backward over the first threshold distance; and zoom out by the first preset level based on the distance of movement when the portable terminal is moved forward over the first threshold distance.
 17. A method for providing a service using a sensor and image recognition in a portable terminal, comprising: displaying, by the portable terminal, a preview image obtained by a camera of the portable terminal; determining, using an acceleration sensor, whether the portable terminal is moved over at least one threshold distance of two or more threshold distances; in response to determining that the portable terminal is moved over a first threshold distance, adjusting a zoom level of the camera based on a distance of movement of the portable terminal; and in response to determining that the portable terminal is moved over a second threshold distance, restricting the zoom level of the camera, wherein the first threshold distance is longer than the second threshold distance.
 18. An apparatus for providing a service using a sensor and image recognition in a portable terminal, comprising: a camera configured to obtain an image; a display configured to display a preview image obtained through the camera; an acceleration sensor configured to measure movement of the portable terminal; and a controller configured to: determine, using an acceleration sensor, whether the portable terminal is moved over at least one threshold distance of two or more threshold distances; in response to determining that the portable terminal is moved over a first threshold distance, adjust a zoom level of the camera based on a distance of movement; and in response to determining that the portable terminal is moved over a second threshold distance, restrict the zoom level of the camera, wherein the first threshold distance is longer than the second threshold distance. 